Wall structure of large-sized refrigerated storage and construction method thereof

ABSTRACT

The present invention discloses a wall structure of a large-sized refrigerated storage and a construction method thereof. The construction method for a wall of a refrigerated storage comprises the following steps: A. building a wall framework; B. mounting a color steel plate on the outer surface of the framework to form an exterior wall board of the wall of the refrigerated storage; C. spraying polyurethane spraying material on the exterior wall board layer by layer for multiple times, and reserving a pouring space at a distance of 40 mm to 80 mm from the installation position of an interior wall board; and D. taking the color steel plate of the interior wall as a mold plate and filling the pouring space of the color steel plate of the interior wall with polyurethane pouring material thus to form the interior wall board of the wall of the refrigerated storage.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application is a Continuation Application of U.S. patent application Ser. No. 14/073,120 filed on Nov. 6, 2013, which is a divisional application of U.S. patent application Ser. No. 13/262,242 filed on Sep. 30, 2011, now U.S. Pat. No. 8,602,251, which is a U.S. national phase application of PCT application No. PCT/CN2010/071436 filed on Mar. 30, 2010, which claims the benefit of Chinese Patent Application No. 200910038383.0 filed on Apr. 3, 2009. The contents of the above are hereby incorporated by reference.

TECHNICAL FIELD

The present invention relates to a building structure and construction thereof, and in particular to a wall structure of a large-sized refrigerated storage and a construction method thereof.

BACKGROUND OF THE PRESENT INVENTION

At present, the wall construction of a large-sized refrigerated storage can be divided into three types: the first type is a refrigerated storage with a reinforced concrete frame structure, which is constructed by applying an insulating layer to one or both of the outside and inside of the reinforced concrete frame; the second type is a combined refrigerated storage, which is constructed by connecting combined refrigerated storage boards by butting by joints; and the third type is a refrigerated storage with a steel frame structure, which is constructed by building a frame by steels as the wall of the refrigerated storage and then by applying an insulating layer to one or both of the outside and inside of the steel frame.

Although refrigerated storages of the first type have good sealing and thermal insulating properties, they are long in construction period and high in cost, and are not flexible enough. Although refrigerated storages of the second type have relatively short construction period, it is likely to produce gaps in the joints of the assembled refrigerated storage boards during the long-term temperature variation, and consequently, “leakage of cold” is likely to occur and thus the thermal insulating property of the refrigerated storages is influenced. For a large-sized refrigerated storage, due to its large size, this “leakage of cold” problem is particularly serious. A refrigerated storage of the third type is a refrigerated storage with a steel frame structure; and to build such a refrigerated storage with a steel frame structure, it is crucial to deal with the problem of the cold-blocking bridge components inside and/or outside the wall structure and ensure the integrity and sealing property of the insulating layer. At present, to solve this problem, a construction method of a wall insulating layer is combined with a wall structure to build a desired wall of a refrigerated storage.

SUMMARY OF THE PRESENT INVENTION

The technical problems to be solved by the present invention are to provide a structure of a large-sized refrigerated storage and a construction method thereof. The construction period of the wall of the refrigerated storage is short, approximately to that of a combined refrigerated storage. The wall of the refrigerated storage, with good sealing and heat insulating properties, high structural strength and elegant appearance, meets food hygiene requirements.

To solve the above-mentioned technical problems, one of the technical solutions of the present invention is as follows: a wall structure of a large-sized refrigerated storage is provided; the wall includes an interior wall board, an exterior wall board and a framework sandwiched between the interior wall board and the exterior wall board; polyurethane foam plastic is filled between the interior wall board and the exterior wall board; the framework is constituted by steel columns fixed in a vertical direction and light steels fixed in a lateral direction; a cold-blocking bridge component is provided inside the framework; and two ends of the cold-blocking bridge component are respectively welded on the light steels on two sides of the framework. All of the four walls of the refrigerated storage are built by combining a steel structure frame and the interior wall board and the exterior wall board. The construction thereof is of convenience and high efficiency with a short construction period.

As an improvement, the steel columns fixed in the vertical direction in the framework are a row of steel columns erected at the exterior wall board or a high-temperature side; and the light steels fixed in the lateral direction are respectively arranged at the interior wall board and the exterior wall board in parallel.

As an improvement, the cold-blocking bridge component mainly consists of heat insulating rods and screws; the heat insulating rod is made of high impaction pp (polyethylene propylene as the main component) and is a solid cylinder; two ends of the heat insulating rod are respectively connected to one end of the screw; and the other end of the screw is fixedly welded on the framework. The heat insulating rods, with good heat insulating property, can effectively prevent the refrigerated storage from exchanging heat with the outside world, and the cold-blocking bridge functions in a more obvious manner. The structure is a solid cylinder, which endows the structure with high impaction resistance. The heat insulating rods are connected to and fixedly welded on the framework by screws. In this way, the strength of the heat insulating rods is further enhanced, and the whole framework is also reinforced.

As an improvement, the heat insulating rods on a same level are substantially perpendicular to the interior wall board and the exterior wall board; and a distance between adjacent heat insulating rods is 500 mm to 1000 mm. The rational distribution of the heat insulating rods can well reinforce the whole framework, and meanwhile ensure the whole cold-blocking bridge of the wall.

As an improvement, the interior wall board is a color steel plate, a stainless steel plate, or a sandwich panel; the exterior wall board is a color steel plate, a stainless steel plate, an aluminum plate or a sandwich panel; the steel columns are C-shaped steels or channel steel columns; the light steels can be angle steels or C-shaped steels; and a distance between two adjacent steel columns is 2000 mm to 4000 mm. The wall of the refrigerated storage is mounted by adopting a double-faced color steel plate, a stainless steel plate or an aluminum plate, so that the fireproof property and collision resistance can be improved. The wall of the refrigerated storage, which is safe and reliable and has an elegant appearance, meets food hygiene requirements. The C-shaped steels or channel steel columns, which are high in structural strength, can effectively avoid the “leakage of cold” problem resulted from stress concentration on joints of assembled refrigerated storage boards. Thus, the service life of the refrigerated storage can be prolonged.

To solve the problems mentioned above, another technical solution of the present invention is as follows: a construction method for a wall of a large-sized refrigerated storage is provided, including the following steps:

A. building a wall framework, a framework of each wall of the refrigerated storage being connected to each other so as to form an integral frame;

B. mounting a color steel plate, a stainless steel plate, an aluminum plate or a sandwich panel on the outer surface of the framework, and assembling the color steel plate, the stainless steel plate, the aluminum plate or the sandwich panel to form an exterior wall board of the wall of the refrigerated storage.

C. spraying polyurethane spraying material on the exterior wall board layer by layer for multiple times, and reserving a pouring space at a distance of 40 mm to 80 mm from the installation position of the interior wall board; and

D. mounting color steel plates, stainless steel plates or a sandwich panels of the interior wall in sequence; taking an interior color steel plate, a stainless steel plate or a sandwich panel as a mold plate and filling the pouring space at the interior color steel plate, the stainless steel plate or sandwich panel with polyurethane pouring material; and after the polyurethane pouring material is solidified and the pouring space is full of the polyurethane pouring material, mounting another color steel plate, stainless steel plate or sandwich panel and filling with the polyurethane pouring material again thus to form an interior wall board of the wall of the refrigerated storage.

This construction method is simple and has a short construction period. With regard to the interior wall, a special construction process is used to pour and mount a color steel plate, a stainless steel plate or a sandwich plate to integrate the color steel plate, the stainless steel plate or the sandwich plate and the foam, so that the interior wall is firm and practical. There is no gap between the color steel plate, the stainless steel plate and the foam, the foam can be protected to the maximum and the foaming agent can be prevented from escaping effectively, and the heat conductivity can be maintained at a stable level. The wall has high integrity and high sealing property and impact resistance, so that the service life of the polyurethane foam is prolonged.

As an improvement, in the step A, the framework is built by C-shaped steels and angle steels, and a row of steel columns are erected at the exterior wall board or a high-temperature side; the distance between adjacent C-shaped steels is 2000 mm to 4000 mm; a plurality of angle steels are fixed in a lateral direction on the erected C-shaped steels; and one end of the cold-blocking bridge component is welded on the angle steel at the exterior wall board, and the other end of the cold-blocking bridge component is welded on the angle steel at the interior wall board.

As an improvement, in the cold-blocking bridge component, the distance between the heat insulating rods on a same level is 500 mm to 1000 mm.

As an improvement, in the step B and the step D, the color steel plate, the stainless steel plate or the aluminum plate of the exterior wall and the color steel plate, the stainless steel plate or the aluminum plate of the interior wall are all fixed on the angle steels of the framework by self-tapping screws or sealed blind rivets.

As an improvement, the method for spraying layer by layer for multiple times in the step C includes the following steps:

at the first time, spraying polyurethane material with a thickness of 10 mm to 15 mm on the color steel plate, the stainless steel plate or the sandwich panel of the interior wall, as an underlayer;

at the second time, spraying the polyurethane material with a thickness of 15 mm to 25 mm; and

at the third time, spraying the polyurethane material with a thickness of 25 mm to 35 mm, and taking the thickness as the model for each spraying until stopping at a distance of 40 mm to 80 mm from the position of the interior wall board,

each interval between two sprayings being not less than 5 minutes.

When compared with the prior art, the present invention has the following beneficial effects:

1) the present invention is suitable for quickly spraying a refrigerated storage of a light steel structure, provides better heat insulating performance and saves 10% of energy in comparison with a combined storage;

2) the construction of the wall of the refrigerated storage is of convenience and high efficiency, with a construction period merely being half of that of a civil-constructed storage and approximately to that of the combined storage;

3) since the wall and the storage are constituted by a double-faced color steel plate, a stainless steel plate or an aluminum plate, the fireproof property and collision resistance can be improved; and the wall and the storage, which are safe and reliable and have an elegant appearance, can meet food hygiene requirements;

4) the wall, as an integral piece, is free from joints and has good heat insulating effect, proximately to that of a civil-constructed storage; and the light steel, which is high in structural strength, can effectively prevent the “leakage of cold” problem resulted from stress concentration on joints of the refrigerated storage boards, thus prolonging the service life of the storage.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a longitudinal sectional view of the present invention;

FIG. 2 is a top view of the present invention;

FIG. 3 is a view of distribution of heat insulating rods; and

FIG. 4 is a flowchart of a construction process of a wall of the present invention.

DETAILED DESCRIPTION OF THE PRESENT INVENTION

The present invention will be further described with reference to the accompanying drawings below.

Embodiment 1

As shown is FIGS. 1 to 3, a wall structure of a large-sized refrigerated storage is provided; the wall includes an interior wall color steel plate 1 as an interior wall board of the wall, an exterior wall color steel plate 2 as an exterior wall board of the wall, a framework sandwiched between the interior color steel plate 1 and the exterior wall color steel plate 2; and polyurethane foam plastic 7 is filled between the interior wall color steel plate 1 and the exterior wall color steel plate 2. The framework is constituted by steel columns 6 fixed in a vertical direction and angle steels 5 fixed in a lateral direction; the steel columns 6 fixed in the vertical direction in the framework are a row of C-shaped steels erected at the exterior wall board or a high-temperature side 2; and the angle steels 5 fixed in the lateral direction are respectively arranged at the interior wall color steel plate 1 and the exterior wall color steel plate 2 in parallel. To fix the angle steels 5 at the interior wall color steel plate 1, a cold-blocking bridge component is provided between angle steels 5 which are on a same level and at the interior wall color steel plate 1 and the exterior wall color steel plate 2 for fixed connection. With the addition of the cold-blocking bridge component, the whole framework structure can become more firm and can prevent cold in the refrigerated storage from escaping. In this embodiment, both of the interior wall color steel plate 1 and the exterior wall color steel plate 2 are formed by assembling corrugated color steel plates. The interior wall color steel plate 1 is fixed on the angle steel 5 at the interior wall board, and the exterior wall color steel plate 2 is fixed on the angle steel 5 at the exterior wall board. The polyurethane foam plastic 7 inside the wall is combined with the interior wall color steel plate 1 and the exterior wall color steel plate 2 to form an integral piece.

In the present invention, to further strengthen the framework structure, steel columns 6 can be simultaneously erected at the interior wall color steel plate 1 and the exterior wall color steel plate 2, and surfaces of the framework coming into contact with the interior wall color steel plate 1 and the exterior wall color steel plate 2 form two square-formed net frames. The net frames are formed by alternately welding the C-shaped steel columns arranged in a vertical direction and the angle steels 5 arranged in a lateral direction. The angle steels 5 on the net frame of the interior wall board are flush with those on the net frame of the exterior wall board. A cold-blocking bridge component is welded on the angle steels 5 which are on a same level and at the interior wall color steel plate 1 and the exterior wall color steel plate 2. Thus, the overall framework structure becomes more firm.

The distance between adjacent steel columns 6 can be 2000 mm to 4000 mm, as desired. In the case of meeting limitation requirements, in this embodiment, the distance between steel columns 6 exhibits the best effects when set as 3000 mm.

The cold-blocking bridge component mainly consists of heat insulating rods 3 and screws 4; the heat insulating rod 3 is made of polypropylene material and is a solid cylinder; in order to conveniently and quickly connect the heat insulating rods and the screws, two ends of the heat insulating rod 3 are provided with screw holes or inset with metal wires; and one end of the screw 4 is connected to the screw hole or metal wires of the heat insulating rod 4 by spinning, and the other end of the screw 4 is fixedly welded on the angle steel 5. Heat insulating rods 3 are weld in each layer of angle steels 5, and the heat insulating rods 3 in a same layer are at a same level and substantially perpendicular to the interior wall board 1 and the exterior wall board 2. According to the actual situation, a distance between adjacent heat insulating rods is 500 mm to 1000 mm. In this embodiment, the distance between heat insulating rods 3 exhibits the best effects when set as 750 mm.

Embodiment 2

As shown in FIGS. 1 to 4, a construction method for a wall of a large-sized refrigerated storage is provided, including the following steps:

A. building a wall framework, a framework of each wall of the refrigerated storage being connected to each other so as to form an integral frame;

B. mounting and fixing the exterior wall color steel plate 2 on the outer side of the framework by using sealed blind rivets with a good waterproof performance, and assembling the exterior wall color plates 2 to form the exterior wall board of the wall of the refrigerated storage.

C. spraying polyurethane spraying material on the exterior wall color steel plate 2 layer by layer for multiple times, and reserving a pouring space at a distance of 40 mm to 80 mm from the installation position of the interior wall color steel plate 1; and

D. mounting interior wall color steel plates in sequence, and taking one of the interior wall color steel plates 1 as a mold plate; pouring polyurethane pouring material into a pouring space at the interior wall color steel plate 1; and after the polyurethane pouring material is solidified and the pouring space is full of the polyurethane pouring material, mounting another color steel plate and filling with the polyurethane pouring material again thus to form an interior wall board of the wall of the refrigerated storage. According to different requirements, the interior wall board can be a stainless steel plate or a sandwich panel.

In the step A, the framework is built by C-shaped steels and angle steels 5, and a row of steel columns 6 are erected at the exterior wall color steel plate 2 or a high-temperature side; the distance between adjacent steel columns 6 is 3000 mm; a plurality of angle steels 5 are fixed in a lateral direction on the erected steel columns 6; and one end of the cold-blocking bridge component is welded on the angle steel 5 at the exterior wall color steel plate 2, and the other end of the cold-blocking bridge component is welded on the angle steel 5 at the interior wall color steel plate 1. In the cold-blocking bridge component, the distance between the heat insulating rods on a same level is 750 mm.

The method for spraying layer by layer for multiple times in the step C includes the following steps:

at the first time, spraying polyurethane material with a thickness of 10 mm to 15 mm on the exterior wall color steel plate 1; and spraying a second layer of polyurethane material again after a 5-minute interval during which the polyurethane material is completely solidified;

at the second time, spraying the polyurethane material with a thickness of 15 mm to 25 mm; and spraying a third layer of polyurethane material again after a 5-minute interval during which the polyurethane material is completely solidified;

at the third time, spraying the polyurethane material with a thickness of 25 mm to 35 mm, and taking the thickness as the model for each spraying until stopping at a distance of 40 mm to 60 mm from the position of the interior wall board, each interval between two sprayings being 5 minutes.

The reserved space having a width of 60 mm is used for implementing the step D which includes the following steps: mounting the interior wall color steel plate 1 by sealed blind rivets; and pouring the polyurethane pouring material between the mounted interior wall color steel plate 1 and a sprayed polyurethane foam layer. The pouring process is performed plate by plate. That Is, when a plate is fully of the pouring material, a next plate is then fastened and mounted and then poured so that the solidified polyurethane forms an integral piece with the interior wall color steel plate 1 and the insulating layer. There is no gap between the interior wall color steel plate 1 and the foam, and the joints between the interior wall color steel plates 1 assembled to each other are completely sealed.

If the wall structure of the refrigerated storage of this embodiment is applied in a refrigerated storage as a partition wall, the connection between the wall, and the top of refrigerated storage and the ground can also be processed by using heat insulating rods as heat-blocking bridges. With regard to the present invention, the structure is simple, and the structural strength of the light steel is high; the construction process of the wall of the refrigerated storage of the present invention is of convenience and high efficiency, with a construction period being merely half of that of a civil-constructed refrigerated storage, approximately to that of a combined storage; by the spraying and pouring method, the exterior color steel plates, the stainless plates or the aluminum plates are bonded to the heat insulating layer to form an integral piece, with good gas separation and collision resistance; the foam does not contact with air, contributing to slow release and loss of the foaming agent and thus aging resistance; and the use of heat insulating rods as cold-blocking bridges is safe and reliable, and the construction is quick. 

1. A construction method for a wall of a large-sized refrigerated storage, comprising the following steps: A. building a wall framework, a framework of each wall of the refrigerated storage being connected to each other so as to form an integral frame; B. mounting a color steel plate, a stainless steel plate, an aluminum plate or a sandwich panel on the outer surface of the framework, and assembling the color steel plate, the stainless steel plate, the aluminum plate or the sandwich panel to form an exterior wall board of the wall of the refrigerated storage; C. spraying polyurethane spraying material on the exterior wall board layer by layer for multiple times, and reserving a pouring space at a distance of 40 mm to 80 mm from the installation position of the interior wall board; and D. mounting color steel plates, stainless steel plates or a sandwich panels of the interior wall in sequence; taking an interior color steel plate, a stainless steel plate or a sandwich panel as a mold plate and filling the pouring space at the interior color steel plate, the stainless steel plate or sandwich panel with polyurethane pouring material; and after the polyurethane pouring material is solidified and the pouring space is full of the polyurethane pouring material, mounting another color steel plate, stainless steel plate or sandwich panel and filling with the polyurethane pouring material again thus to form an interior wall board of the wall of the refrigerated storage.
 2. The construction method for a wall of a large-sized refrigerated storage according to claim 1, wherein: in the step A, the framework is built by C-shaped steels and angle steels, and a row of steel columns are erected at the exterior wall board or a high-temperature side; the distance between adjacent C-shaped steels is 2000 mm to 4000 mm; a plurality of angle steels are fixed in a lateral direction on the erected C-shaped steels; and one end of the cold-blocking bridge component is welded on the angle steel at the exterior wall board, and the other end of the cold-blocking bridge component is welded on the angle steel at the interior wall board.
 3. The construction method for a wall of a large-sized refrigerated storage according to claim 2, wherein, in the cold-blocking bridge component, the distance between the heat insulating rods on a same level is 500 mm to 1000 mm.
 4. The construction method for the large refrigerated storage wall according to claim 1, wherein, in the step B and step D, the color steel plate, the stainless steel plate or the aluminum plate of the exterior wall and the color steel plate, the stainless steel plate or the aluminum plate of the interior wall are all fixed on the angle steels of the framework by self-tapping screws or sealed blind rivets.
 5. The construction method for a wall of a large-sized refrigerated storage according to claim 1, wherein the method for spraying layer by layer for multiple times in the step C comprises the following steps: at the first time, spraying polyurethane material with a thickness of 10 mm to 15 mm on the color steel plate, the stainless steel plate or the sandwich panel of the interior wall, as an underlayer; at the second time, spraying the polyurethane material with a thickness of 15 mm to 25 mm; and at the third time, spraying the polyurethane material with a thickness of 25 mm to 35 mm, and taking the thickness as the model for each spraying until stopping at a distance of 40 mm to 80 mm from the position of the interior wall board, each interval between two sprayings being not less than 5 minutes. 